Thanks a lot, Prof Lumley. Now I can fit a model like
coxfit=coxpy((time,censor)~pspline(x1)+x2+x3) but I am not sure how to extract the estimated function for x1 alone. I tried to use predict function but couldn't find appropriate option to do this. if i only have one covariates, then the example in help manule can be used as plot(x1, predict(coxfit)) but with more than 1 predictor, i am not sure how to select the one i want. On 2/19/08, Thomas Lumley <[EMAIL PROTECTED]> wrote: > > On Mon, 18 Feb 2008, gallon li wrote: > > > i am trying to fit a survival regression model (cox model or parametric > > model) in R by including the covariate effects as a function m(x) > instead of > > just beta*x. is it possible to fit such a model? can someone recommend > some > > reference? I searched but only found a package called addreg where > > the hazard is actually modeled additively. That is not what i want. > > The survival package has pspline() for this purpose (assuming that by > 'non-parametric' you mean a flexible smooth curve) > > -thomas > > Thomas Lumley Assoc. Professor, Biostatistics > [EMAIL PROTECTED] University of Washington, Seattle > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.